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RESEARCH PAPERS

Investigation of Different Methods to Control a Small Variable-Speed Wind Turbine With PMSM Drives

[+] Author and Article Information
Jamel Belhadj

 ENIT-LSE, BP 37 Le Belvèdère, 1002 Tunis, Tunisia;  ESSTT, GE, BP 56, 5 Avenue Taha Hussien, 1008 Tunis, TunisiaJamel.Belhadj@esstt.rnu.tn

Xavier Roboam

LEEI, UMR CNRS-INPT/ENSEEIHT, 2 Rue Camichel BP 7122, 31071 Toulouse cedex 7, FranceXavier.Roboam@leei.enseeiht.fr

J. Energy Resour. Technol 129(3), 200-213 (Nov 04, 2006) (14 pages) doi:10.1115/1.2748813 History: Received May 09, 2005; Revised November 04, 2006

In this paper, a different control strategy of a small wind generator, including a permanent magnet synchronous machine (PMSM), has been studied. The objective is to analyze the produced power quality of small wind turbines connected to weak AC grids. The extraction of the electrical energy from the wind turbine is based on a maximum power point tracking (MPPT) algorithm to control a pulse width modulation (PWM) rectifier. The grid connection is realized by means of a PWM voltage source inverter via a filter. This inverter is controlled by three different methods based on current or active and reactive power control. These methods are applicable for different power ranges. The obtained results demonstrate the efficiency of the system and the energetic contribution, mainly for rural weak AC grids.

Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Block diagram of the direct-drive wind energy conversion system

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Figure 2

Instantaneous wind speed sample

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Figure 3

Block diagram of the MPPT with torque controlled PMSG feeding a PWM rectifier

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Figure 4

Performance of the FOC of the generator: (1): (Isd,Isdref), (2): (Isq,Isqref), and (3): (Tem,Temref)

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Figure 5

Wind power versus turbine speed

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Figure 6

Performance of the MPPT algorithm

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Figure 7

Power balance with fixed wind speed (16m∕s): (1): electric DC power, (2): wind turbine power, and (3): maximal wind power

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Figure 8

Power balance with variable wind speed: (1): electric power, (2): wind turbine power, and (3): maximum wind power

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Figure 9

Control of the DC bus voltage

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Figure 10

Hysteresis current control of the grid connected inverter

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Figure 11

Evolution of a reference line current versus time with different wind speeds: (1): (Vwind=16m∕s); (2): (Vwind=12m∕s), and (3): (Vwind=7m∕s)

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Figure 12

PI currents control grid connecting classical PWM inverter

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Figure 13

Performance of the (d,q) current PI control

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Figure 14

Powers control approach for grid connecting PWM inverter

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Figure 15

(d,q) currents components regulation performances with the third strategy

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Figure 16

Reactive power injected to grid by the LC filter used in the first method

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Figure 17

Active power output for different wind speeds

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Figure 18

Limitation of the output power with turbulent winds

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Figure 19

Generator-AC-DC converter efficiency versus wind turbine

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Figure 20

Current obtained by hysteresis control method with fixed wind speed

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Figure 21

Voltage grid effect with turbulent wind and the first control strategy

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Figure 22

Current obtained by the PI control method with fixed wind speed

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Figure 23

Current obtained by the power control method with fixed wind speed

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Figure 24

Current obtained by hysteresis control method with variable wind speed

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Figure 25

Injected current obtained by the PI control method with variable wind speed

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Figure 26

Injected current obtained by the powers control method with variable wind speed

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